LATIN DICTIONARYLexicon Latīnum
noun · femininefirst declension

etēsiae

etēsiae f pl (genitive etēsiārum)

Meaning

  1. the Etesian winds (N-W winds that blow annually in the Aegean Sea during the dog-days for forty days)
    Ipse enim necessario etesiis tenebatur, qui navigantibus Alexandria flant adversissimi venti.He (Caesar) was necessarily detained by the Etesian winds, winds that are most unbecomming for those who travel from the shores of Alexandria.c. 48 BCE, Julius Caesar, Commentarii de bello civili 3.107

Declension

declension
formsingularplural
nominative—etēsiae
genitive—etēsiārum
dative—etēsiīs
accusative—etēsiās
ablative—etēsiīs
vocative—etēsiae

ĕtēsĭae, ārum, m., = ἐτησίαι (sc. ἄνεμοι),
I. the winds that blow annually during the dog-days for forty days, Etesian winds, trade-winds, Sen. Q. N. 5, 10 sq.; Col. 11, 2, 56; 58; Lucr. 6, 716; Cic. N. D. 2, 53; id. Fam. 2, 15 fin.; id. poët. Or. 45; Caes. B. C. 3, 107; Liv. 37, 23 et saep.—In sing.: ete-sias, ae, m., = ὁ ἐτησίας, Plin. 18, 34, 77, § 335.

Origins

From Ancient Greek ἐτησίαι (etēsíai).

Quick answers

What does etēsiae mean in Latin?
etēsiae, a noun, means “the Etesian winds (N-W winds that blow annually in the Aegean Sea during the dog-days for forty days)”.
What is the genitive of etēsiae?
The genitive singular is etēsiārum. etēsiae is feminine, first declension.